Can you try benchmark using crystaldisk and post results so that we can compare results?
I also have a G752VT and here is my result.
Samsung 950 PRO:
By comparison, Samsung 850 EVO:
I also have a G752VT and here is my result.
Samsung 950 PRO:
By comparison, Samsung 850 EVO:
Buggsy wrote:
Your problem is that you are using AHCI. With an NVMe drive, you have to use RAID, which means when you install Windows 10 you need the RAID drivers from Asus. the AHCI protocol is *kind of* like downgrading your NVMe to a SATA drive. You end up throttling the crap out of that NVMe drive.
Check out this chart from Wiki. It explains it better than I can.
https://en.wikipedia.org/wiki/NVM_Express#Comparison_with_AHCI
Ok, so i should try to install win10 with RAID mode enabled ?
Do you know maybe which of this directories from Asus (eSupport dir) contains proper driver ?
Thanks for a clue! 🙂
Update: I did try installing win10 on NVME (RAID mode), but wasnt detected. I have tried installing Intel RAID controller, but go bluescreen (iaStorAV.sys failed). If i tried installing Windows\System32\DriverStore\FileRepository\stornvme.inf_amd64_81abc12481a950f2, it doesnt detect any compatible hardware. Are you sure i should try to run it under RAID mode ? I did little trick with win10 safe to switch my current installation to RAID mode - it worked, but now NVME is not even detected in win10. I try "Scan for hardware changes", but nothing is found. Any ideas ?
Update2: Ok, i guess i forgot to install Intel Rapid Storage Driver. After that, NVME showed up, but similarly to my Patriot experience, it runs on
iaStorA.sys driver. On READ-side performance is the same but WRITE is even worse. Like i wrote, with CDM i had "ok" results (under AHCI mode and as secondary storage), but now even CDM shows bad results. Do i need to try to force-install stronvme.sys somehow ?
Update3: Ok, bad performance in CDM was due to disabled "Write cache policy" - manufacturer recomends to enable it. But performance in AS SS is still bad:
So to summarize, i would say nothing to little has changed in terms of performance in AS SSD. In terms of compatibility, i cant install win10 - maybe i need to try different build version of this driver? And now (in RAID mode) CrystalDiskInfo doesnt detect my NVME completely. Plextool also doesnt detect it.
Buggsy wrote:
Your problem is that you are using AHCI. With an NVMe drive, you have to use RAID, which means when you install Windows 10 you need the RAID drivers from Asus. the AHCI protocol is *kind of* like downgrading your NVMe to a SATA drive. You end up throttling the crap out of that NVMe drive.
Check out this chart from Wiki. It explains it better than I can.
https://en.wikipedia.org/wiki/NVM_Express#Comparison_with_AHCI
I have to respectfully disagree with this. Raid is only necessary when running a raid array. The BIOS is setting is misleading. It should be labeled raid enabled/disabled. NVMe does not use AHCI protocol, it uses NVMe totally different.*
People were actually making a fuss when the G752 first came out and you could not disable the raid.*
If you read around a bit you will see plenty of posts showing no performance difference in the two. I've run both ways and got similar results. The reason people were having a cow is Samsung drivers and Samsung magician cannot see past a raid controller. So when they made it where you can disable the raid more comparisons were done between native windows NVMe drivers and Samsungs (which only work on the consumer drives like lime 950 pro etc. *Samsung drivers and software does not work on OEM drives.*
ASSD has an issue with NVMe drives. Crystal Diskmark works much better. Just be prepared that you won't see the same results as the Samsung drives. They are top of the heap in NVMe.
Ive run my G752VY with 950 pros as single with both raid enabled and disabled, no discernible difference. I have fast boot disabled as well as CSM disabled with a UEFI install. I have two 512GBs. Now running raid zero which only offers a small improvement in sequential read but doubles sequential writes. *
I'm afraid where your problem lies is with selection of the SSD. It's better than a SATA SSD but is nowhere close to Samsung, not even in the same ballpark. It's about half the speed. Here's the results for Toms review comparisons. Hellfire is near the bottom.*
*
Mystery Solved !!!
It turns out it had nothing to do with BIOS mode or anything like it. Disk drive "write caching policy" is making huge difference for this technology:
When disabled option 1. (effectively ALL) even CDM results were very BAD. This is described on manufacturer's website.
Enabling 2. option made results with AS SSD and Anvil OK.
To summarize (for those who might stumble on this thread while "hopelessly" searching for solution to their issues):
From my experience SATA mode (RAID/AHCI) havent had any effect on performance, but under RAID it is harder for win10 installer to
recognize NVME SSD's and makes win10 to use not recomended (by MS) driver for this hardaware (iaStorAC instead of stornvme).
For the sake of simplicity and comfort i am gonna switch back to AHCI mode and go for fresh install on my NVME.
As it turned out that all this time it was simply matter of proper win10 configuration i am considering switching back to Patriot
SSD (sic!), i can still return my current SSD without a reason. Patriot seems 50% faster on WRITE-side, but is made in lower
quality imo - overheating (i had 66-75, maybe due to bad win10 configuration, but i doubt it), shabby boxing, 3-year warranty only.
Plextor is super cool (i bought version with heat sink), some extra vendor-specific features (True Protect, True Speed), 5-year warranty and
a actual box with extra SCREW inside!!! But its slower nonetheless. I know this is a lil bit off-top, but maybe some of you could share his/her opinion
on this.
Anyways.
Ty all for your attention and support! I hope someday i can give sth back to the community in return.
It turns out it had nothing to do with BIOS mode or anything like it. Disk drive "write caching policy" is making huge difference for this technology:
When disabled option 1. (effectively ALL) even CDM results were very BAD. This is described on manufacturer's website.
Enabling 2. option made results with AS SSD and Anvil OK.
To summarize (for those who might stumble on this thread while "hopelessly" searching for solution to their issues):
From my experience SATA mode (RAID/AHCI) havent had any effect on performance, but under RAID it is harder for win10 installer to
recognize NVME SSD's and makes win10 to use not recomended (by MS) driver for this hardaware (iaStorAC instead of stornvme).
For the sake of simplicity and comfort i am gonna switch back to AHCI mode and go for fresh install on my NVME.
As it turned out that all this time it was simply matter of proper win10 configuration i am considering switching back to Patriot
SSD (sic!), i can still return my current SSD without a reason. Patriot seems 50% faster on WRITE-side, but is made in lower
quality imo - overheating (i had 66-75, maybe due to bad win10 configuration, but i doubt it), shabby boxing, 3-year warranty only.
Plextor is super cool (i bought version with heat sink), some extra vendor-specific features (True Protect, True Speed), 5-year warranty and
a actual box with extra SCREW inside!!! But its slower nonetheless. I know this is a lil bit off-top, but maybe some of you could share his/her opinion
on this.
Anyways.
Ty all for your attention and support! I hope someday i can give sth back to the community in return.
